Features of the Response of the Cardiovascular System to Geomagnetic Disturbances at Different Latitudes

Bioefficacy of Geomagnetic Activity in the Period of the COVID-19 Pandemic

“…It is known that the adaptive responses of the cardiovascular and nervous systems to changes in geomagnetic activity in healthy volunteers are consistent with each other and do not depend on the region of residence. For example, Parshina et al (2020aParshina et al ( , 2020b described the coincidence of the group effects of cardiac and psychological sensitivity to geomagnetic disturbances. During pandemics, the psychoemotional state of even healthy individuals changes significantly.…”

“…Our study continued for 2 months (March-April 2020). The ECG phase portrait and blood pressure were monitored daily according to the established algorithm (Parshina et al, 2020a). The spring season is transitional: at this time, the most pronounced changes in the amount and amplitude of the geomagnetic disturbance of the Earth occur, which makes it possible to more precisely reveal the responses of the cardiovascular system indices.…”

“…In the case of Kp-TSC synchronization (coincidence of the maxima of these indices in the analysis of their time series during the 60-day monitoring period) in more than 66.7% of the Kp index peaks, the subject was considered cardiosensitive to geomagnetic disturbances. The group cardiac sensitivity (or the group effect of cardiac sensitivity) was determined as the percentage of the cardiosensitive volunteers to the total number of volunteers in the observation group (Parshina et al, 2020a).…”

“…That is why researchers are interested in studying the influence of geomagnetic disturbances on the state of the myocardium of healthy volunteers under various external physical conditions (different latitudes of residence, different meteorological parameters, etc.) (Kleimenova et al, 2007;Parshina et al, 2020a).…”

“…We had at our disposal the database of the Geliomed-2 multilatitude biophysical experiment on the study of the influence of space-weather factors on human health in the Arctic (Tiksi settlement), subarctic (Yakutsk), and temperate (Saratov) latitudes (Parshina et al, 2020a). This database includes measurements since 2014, which makes it possible to compare the responses of healthy volunteers to geomagnetic distur-bances in the period before the pandemic with the responses of the surveyed volunteers in 2020, during the COVID-19 pandemic.…”